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1/2 Pump SD8780 Circuit Board 6600-779 - Bubbles Supply

1/2 Pump SD8780 Circuit Board 6600-779

Part #: 6600-779

$2090.12
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this spa pump

The SD8780 Circuit Board is an OEM replacement control pack for Sundance Spas manufactured from 2016 onward. This genuine Sundance control board manages 1 or 2-pump spa systems, delivering the precise electronic control your hot tub needs for reliable operation. Engineered to factory specifications, this circuit board maintains all original functionality including pump sequencing, temperature regulation, and system diagnostics.

At Bubbles Supply, we guarantee an exact fit for your Sundance spa with our authentic OEM parts. Every SD8780 control board ships same-day when ordered by 2 PM EST and comes backed by our comprehensive 1-year warranty for complete peace of mind. Professional installation is recommended for proper wiring and system integration. Always verify your current circuit board part number matches SD8780 before ordering to ensure compatibility with your spa's control system.

Exact part number

6600-779

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 6600-779 circuit board
  • SD8780 control pack
  • Sundance 1/2 pump control board

Looking for an older part number? Check our supersession lookup tool

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Spa jets not responding to control panel commands
  • Pump fails to sequence or start on demand
  • Erratic pump behavior or random shutdowns
  • Spa stuck in error or fault mode related to pump control
  • Temperature not holding due to pump control failure
  • Control panel shows pump running but no jet output

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your existing circuit board is labeled SD8780 or part number 6600-779 before ordering
  • Verify your spa was manufactured 2016 or later — this board is not confirmed compatible with earlier production years
  • Check whether your system runs 1-pump or 2-pump configuration and confirm this board supports it
  • Note your existing board's wiring harness connector layout before removal to ensure pin compatibility
  • Document any active fault codes displayed on your topside panel — some codes may indicate a component failure unrelated to the control board

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Hard — Technician recommended

Warranty

1 year warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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